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7149238 |
Highly bandwidth-efficient communications
A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked,...
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7145933 |
Method and apparatus for generating random signals
A random binary signal is generated using a plurality of noise sources, each of which defines events occurring at random intervals, the outputs of the sources being combined in such a way that the...
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7145961 |
Ultra wideband transmitter
An ultra-wideband transmitter is provided. In one embodiment, the transmitter uses a monopulse of a continuous cyclic signal to phase shift a data pulse. The data pulses and the cyclic signal may...
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7145937 |
GMSK spread modulation
Spread spectrum GMSK signals are presented. Transmission may involve obtaining a sequence of data symbols, obtaining a spread spectrum code comprising a sequence of spread spectrum chips,...
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7145964 |
Maximizing data rate by adjusting codes and code rates in CDMA system
The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number...
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7142578 |
Single beamforming structure for multiple modulation schemes
A method for a beam forming configuration is provided. A representation of a 3D polygon is formed from a plurality of blocks. The blocks are arranged according to a frequency, a time, and a space...
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7142888 |
Radio communication method, base station and mobile station
The object of the present invention is to improve the accuracy of channel estimation and increase downlink capacity when a base station transmits an individual channel using directional beams. The...
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7142579 |
Apparatus for providing high quality audio output by median filter in audio systems
An apparatus includes a receiving circuit, a demodulation module, a frame synchronization control module, a filter, and an audio conversion device. The receiving circuit is used to receive a radio...
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7133356 |
Method and apparatus for reducing EMI emissions
Briefly, in accordance with one embodiment, a circuit to encode binary digital signals so as to reduce EMI emissions during signal transmission across a bus or interconnect includes circuitry to...
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7129886 |
System and method for detecting an intruder using impulse radio technology
An intrusion detection system and method are provided that can utilize impulse radio technology to detect when an intruder has entered a protection zone. In addition, the intrusion detection system...
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7130352 |
Transceiver apparatus and transceiving method in communication system
Disclosed is a communication system in which it is possible to detect a TFI (Transport Format Indicator) even if a TFCI (Transport Format Combination Indicator) cannot be decoded correctly. The...
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7130326 |
Gated time division multiplexed spread spectrum correlator
A civil moderate (CM) code and a civil long (CL) code are time division multiplex (TDM) as a combined code having alternating code chips that spectrum spread a transmitted signal received by a...
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7126979 |
System and method to autonomously and selectively jam frequency hopping signals in near real-time
The system and method autonomously and selectively jams frequency-hopping signals in near real-time by incorporating a fundamental change in the detection and reaction technology, to provide a...
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7120440 |
Velocity estimation apparatus and method using level crossing rate
Disclosed is a velocity estimator using a level crossing rate. The velocity estimator comprises a power calculator for calculating power values of a signal received from a mobile terminal; a mean...
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7120188 |
User equipment employing a time division duplex technique
Outer loop/weighted open loop power control apparatus controls transmission power levels in a spread spectrum time division duplex communication user equipment (UE). The user equipment receives a...
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7120206 |
Signal DC offset correction method and device
A method and a device for estimating the DC offset portion of a signal, especially of a signal containing parts with sinusoidal shape, for example a signal which results from demodulation of a...
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7120187 |
Spread spectrum wireless communication system
A system for accessing a telephone system, in which a set of user stations are matched with a set of base stations for connection to a telephone network. Each base station may be coupled directly...
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7120186 |
Methods and apparatus for use in generating data sequences for spread spectrum communications
Methods and apparatus for use in generating data sequences for direct sequence spread spectrum (DSSS) communications are described. One exemplary method includes the steps of serially generating a...
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7120189 |
Weighted open loop power control
A base station transmits a reference signal. The base station receives a communication. The received communication has a transmission power level set by measuring an interference level; determining...
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7116698 |
Generator of repetitive sets of spread spectrum sequences
A generator of repetitive sets of spreading sequences comprising element ( 20 ), for counting and for forming an address and a table ( 30 ) containing L sets of S sequences, wherein the address...
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7110431 |
Hardware and software for performing computations in a short-code spread-spectrum communications system
The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One...
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7106779 |
Method and apparatus for providing configurable layers and protocols in a communications system
The layers and protocols of an air interface layering architecture are designed to be modular and can be modified and upgraded to support new features, perform complex tasks, and implement...
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7103061 |
Synchronization codeword for interference reduction in a CDMA system
The CDMA communication system according to the invention comprises at least one primary station ( 2 ) and a plurality of secondary stations ( 4 ). The primary station ( 2 ) and the secondary...
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7103084 |
Apparatus and method for searching preamble signal based on small search window
An apparatus and method of searching a preamble signal in a search window for reducing a chip size of a preamble searcher in a transceiver of a base station is enclosed. By using a plurality of...
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7102993 |
Mobile station, base station, communication system, and communication method
A mobile station, and corresponding system and method, the mobile station including an IQ multiplexer configured to IQ multiplex transmission data for data channels, control data for a control...
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7103026 |
Use of chip repetition to produce a flexible bandwidth DS-CDMA system
A method is disclosed for obtaining a spreading code set for a code division multiple access (CDMA) communications system. The method includes (a) generating a P′×P′ spreading code set where...
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7103458 |
Automation system using wireless high frequency
Communication between a controller and a set of automated vehicles is improved by use of an RF link that employs a high frequency spread spectrum modem that establishes a low noise link in a high...
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7099368 |
Ultra-wideband communication through a wire medium
Methods and apparatus for creating, transmitting and receiving ultra-wideband pulses through wire media are presented. One embodiment of the present invention transmits ultra-wideband pulses that...
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7099371 |
Method for generating and allocating code pairs of orthogonal spreading codes
The present invention relates to an orthogonal spreading code in a code division multiple access (CDMA) mobile communication system, and more particularly, to a method for generating and allocating...
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7099367 |
Method and apparatus for converting RF signals to baseband
The present invention relates to the conversion of signals from RF to baseband using transition functions, or edge functions. These functions typically transition from positive to negative, or from...
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7099369 |
Method and apparatus for surgical high speed follower jamming based on selectable target direction
A Method and Apparatus for Surgical High-speed Follower Jamming Based on Selectable Target Direction is disclosed. The system and method of the present invention automatically detects and jams...
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7099377 |
Method and device for interference cancellation in a CDMA wireless communication system
The method of interference cancellation in a CDMA wireless communication system comprises receiving an incident digital signal containing a user signal transmitted on a CDMA user physical channel...
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7099366 |
Pseudo-random number sequence output unit, transmitter, receiver, communication system and filter unit
A transmitter, receiver, and communication system that utilize a pseudo-random number sequence (PRNS) output unit that provides a PRNS of length N. The PRNS output unit generates the PRNS...
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7095260 |
Spread spectrum clock generation circuit, jitter generation circuit and semiconductor device
A spread spectrum clock generation circuit capable of further reducing the electromagnetic wave radiation with a simple configuration has been disclosed and, particularly in a spread spectrum clock...
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7095779 |
Method and apparatus for automatic jammer frequency control of surgical reactive jammers
A Method and Apparatus for Automatic Jammer Frequency Control of Surgical Reactive Jammers is disclosed. The system and method to autonomously and selectively jam frequency-hopping signals in near...
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7095802 |
Apparatus and method for GPS-based digital compensation of radio frequencies
An apparatus and method for controlling the communication frequencies of a software controlled radio by using GPS to calibrate one or more local oscillators and compensating within the digital...
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7095778 |
Spread spectrum transmitter and spread spectrum receiver
A spread spectrum transmitter provides delays having different magnitudes to spread spectrum (SS) signals for a plurality of channels, and multiplexes the SS signals to generate transmission...
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7095794 |
Methods and apparatus for a spread spectrum modulated backscatter electronic shelf label system
Techniques for an electronic shelf label (ESL) system which uses a digital modulation technique for a modulated backscatter uplink from an ESL to a communication base station (CBS) which utilizes...
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7095290 |
Method and system for generating higher order modulations with QPSK modulator
Method and system for generating higher order modulations with QPSK modulators. A complex sequence of binary digits is input to QPSK modulators. The binary digits are mapped to constellation points...
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7092426 |
Matched filter for scalable spread spectrum communications systems
A spread spectrum communications system uses long, scalable PN sequences to achieve variable communication rates. A low-complexity and scalable matched filter architecture is used to provide a...
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7092440 |
Hybrid spread-spectrum technique for expanding channel capacity
Methods, systems and devices are described for a direct-sequence spread-spectrum communication scheme that increases the number of users by utilizing a plurality of closely spaced orthogonal...
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7088795 |
Ultra wide band base band receiver
The present invention is a receiver having a radio frequency (RF) front end, a pulse detector operatively coupled to the RF front end, and a data recovery unit operatively coupled to the pulse...
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7088763 |
Digital demodulation
A digital demodulator includes a mixing section, 1 st and 2 nd digital comb filters, phase locked loop module, and a data recovery module. The mixing section is operably coupled to produce a...
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7085311 |
Apparatus and method for measuring SIR in CDMA communication system
The present invention includes path delay difference comparator 14 for receiving path delay amounts τ 1 to τ K detected from a reception signal and extracting each pair of paths satisfying...
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7085308 |
Searching in dual-mode communications system
A method including searching for a pilot signal of a second communications system while retaining the connection with a first communications system.
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7082154 |
Power control circuit and power control method
A power control circuit including a first SIR measurement section which obtains separate SIR measurement values for a plurality de-spread signals, a combining section which combines the plurality...
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7082153 |
Variable spacing pulse position modulation for ultra-wideband communication links
Methods and systems for generating a variable spacing pulse position modulated (VSPPM) signal for transmission across an ultra-wideband communications channel. The variable pulse position modulated...
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7079567 |
Digital modulation system using extended code set
A digital (de)modulation system uses a larger code set of M codes for N length codes, where M>N, to provide an increased data rate while maintaining the coding gain. For example, the system can...
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7075969 |
User equipment using combined closed loop/open loop power control
At a first communication station, communications from a second communication station are received. The first station transmits power commands based on in part a reception quality of the received...
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7075968 |
Method for whitening spread spectrum codes
Whitening (i.e., electromagnetic whitening) of a spread spectrum code is achieved, according to principles of the invention, by permuting the code used for spreading of a signal spectrum. Whitening...
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